行业组件数据 · 2026

滤波电容器

Filter capacitors are electronic components that smooth and stabilize voltage by filtering out AC ripple and noise in DC power supplies.

技术定义与适配语境
典型 滤波电容器 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

Filter capacitors are passive electronic components used in power supply systems to reduce alternating current (AC) ripple and electromagnetic interference (EMI) in direct current (DC) circuits. They store electrical energy and release it to maintain a stable voltage output, ensuring reliable operation of sensitive electronic equipment by minimizing fluctuations and noise.

组件规格

定义
Filter capacitors are passive electronic components used in power supply systems to reduce alternating current (AC) ripple and electromagnetic interference (EMI) in direct current (DC) circuits. They store electrical energy and release it to maintain a stable voltage output, ensuring reliable operation of sensitive electronic equipment by minimizing fluctuations and noise.
工作原理
Filter capacitors operate by charging and discharging electrical energy. In a power supply, they are connected in parallel with the load to absorb high-frequency AC components (ripple) and transient spikes, allowing only smooth DC to pass. This is achieved through their capacitance, which resists changes in voltage, effectively 'filtering' out unwanted variations.
材料
Typically made from aluminum electrolyticceramicfilm (e.g.polyesterpolypropylene)or tantalum materials. Aluminum electrolytic capacitors are common for high capacitance valueswhile ceramic capacitors are used for high-frequency filtering.
ESR
Low equivalent series resistance for efficiency
Tolerance
±20%
Capacitance
1 µF to 10000 µF
Voltage Rating
6.3 V to 450 V DC
Temperature Range
-40°C to +105°C
标准
ISO 9001IEC 60384DIN EN 60384

行业分类与别名

滤波电容器 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

High operating temperature->Reduced capacitance or short circuit->Use capacitors with appropriate temperature ratings and ensure proper cooling.
Excessive voltage spikes->Dielectric breakdown->Implement overvoltage protection circuits and select capacitors with higher voltage ratings.

工业生态与工程逻辑

0
Overheating due to high ripple current
1
Electrolyte leakage in aluminum capacitors
2
Voltage overrating leading to failure

合规与检测

tolerance
Capacitance tolerance typically ±20% for electrolytic types, with tighter tolerances available for precision applications.
test method
Testing per IEC 60384 standards, including capacitance measurement, leakage current, ESR, and endurance under rated conditions.

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the main function of a filter capacitor in a power supply?

The main function is to smooth the DC output by filtering out AC ripple and noise, ensuring a stable voltage for connected devices.

How do I choose the right filter capacitor?

Select based on capacitance, voltage rating, temperature range, and application requirements (e.g., frequency, load). Consult datasheets and industry standards.

我可以直接联系工厂吗?

CNFX 是开放目录,不是交易平台或采购代理。工厂资料和表单用于帮助你准备直接沟通。

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数据基础

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初步技术归类
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请求制造能力信息: 滤波电容器

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URN:CNFX:ME:UNIT:FILTER_CAPACITORS